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Numerically investigating the crushing of sandstone by a tooth hob
To investigate the mechanical process that occurs between rocks and tooth hobs, the crushing of sandstone with a tooth hob was simulated using...
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Experimental and Numerical Studies on Splitting Fracture of Rocks Using Different Bit Heads
A hydraulic splitting method was recently developed to reduce the generation of noise and vibration in urban underground construction. However,...
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Estimation of Sand Grains Crushing Rate Under Uniaxial Compression Loading
Understanding and controlling of granular materials behaviour require knowledge of their characteristics and the phenomenon associated with them....
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Experimental Study on the Dynamic Mechanical Properties and Critical Crushing Energy Dissipation Characteristics of Rocks Under Three-Dimensional Dynamic–Static Combinations of Loading Scenarios
To investigate the mechanical and energy dissipation characteristics of gray sandstone at critical failure, dynamic impact compression tests were...
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Grain-scale analysis of proppant crushing and embedment using calibrated discrete element models
Proppant crushing and embedment in hydraulically-induced fractures is a major drawback to the recovery of unconventional oil/gas and geothermal...
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Uniaxial Compression Testing of Sandstone under Microscope: Damage Characteristics and Failure Mechanisms
A compression module system placed under a microscope was utilized to conduct uniaxial compression testing of sandstone samples. The test system can...
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An enhanced constitutive model for quasi-brittle rocks with localized damage
Localized deformation is the failure precursor of quasi-brittle rocks. The objective herein is to propose an enhanced constitutive model...
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Analysis and verification of stress and plastic zone in surrounding rocks of hydraulic flushing borehole based on strain-softening
This study aimed to solve the problem ignored by previous research on hydraulic flushing gas extraction technology regarding the strain-softening of...
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Energy evolution and failure characteristics of sandstone under high temperature and acidic solutions
Sandstone is commonly found in mountainous regions of China, and the mountain tunnels are often built in sandstone strata. The tunnel surrounding...
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The ductile–brittle failure mode transition of hard brittle rock cutting—new insights from numerical simulation
AbstractIn rock mass cutting, the two main failure modes are ductile failure and brittle failure, and it strongly influence the rock breaking...
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Shear failure and mechanical behaviors of granite with discontinuous joints under dynamic disturbance: laboratory tests and numerical simulation
To investigate the fracture mechanical behavior and failure mechanism of jointed rock mass under compression and shear load. Conventional shear tests...
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Deformation and failure laws and acoustic emission characteristics of low-strength molybdenum ore
Uniaxial compression acoustic emission (AE) tests were conducted on low-strength molybdenum ore (LSMO) to investigate its deformation and failure...
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Assessment of permeability changes during rock deformation and failure of a sandstone sample using a stress-dependent pore network model
AbstractIn this paper, we investigated the interplay of rock deformation, micro-crack development, and fluid flow response using a stress-dependent...
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Constitutive modeling of brittle–ductile transition in porous rocks: formulation, identification and simulation
This paper presents a two-surface elastoplastic model for brittle–ductile transition behaviors of porous rocks subjected to compressive stresses. Two...
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Experimental Study on Fracturing Ability of Permian Volcaniclastic Rocks in Sichuan Basin
The Permian volcanic rock reservoir in the Sichuan Basin is a gas reservoir of volcanoclastic of volcano eruption. It is a porous reservoir with low...
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Mechanism of stress distribution and failure around two different shapes of openings within fractured rock-like materials
The complexity of a rock masses structure can lead to high uncertainties and risk during underground engineering construction. Laboratory tests on...
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Longitudinal and cross-sectional partitioned failure mechanism of tunnels subjected to stick-slip action of strike-slip faults
Permanent displacement occurs in strike-slip faults due to stick-slip action, causing significant damage and distinct partitioning features in...
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Effect of strain rate on mechanical response and failure characteristics of horizontal bedded coal under quasi-static loading
Strain rock burst is one of the main types of rock bursts. Studying the mechanical response and acoustic emission characteristics of coal under...
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Research on Mechanical Characteristics and Failure Mechanism of Coal-Rock Combined Bodies with Equal Strength
To investigate the distortion and damage properties of coal-rock combination (CRC) samples, the individual coal samples and rock samples and CRC were...
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Experimental study on mechanical characteristics and permeability evolution during the coupled hydromechanical failure of sandstone containing a filled fissure
In this study, triaxial seepage tests on sandstone specimens containing a preexisting fissure were conducted for three different fissure filling...
